Milwaukee man with a concealed-carry permit shoots a robber in a store... but the store had a sign prohibiting weapons.

Should the man who stopped the robber be charged for bringing the weapon into the store? The DA has decided not to charge the man, Nazir Al-Mujaahid:

Fearing for the safety of himself, his wife and others in the store, he said, he unholstered his semi-automatic 9mm handgun, cocked it and kept it down at his side as he motioned another customer behind the robber to move away.

When the robber turned the shotgun toward him, Al-Mujaahid said, he fired six or seven shots from about 20 feet away. He said he hit the suspect in the leg and forehead. The robber then dropped the shotgun and bag, and fled the store....

(I guess that says something about a 9mm handgun. Hitting the robber in the forehead seems to have merely changed his mind.)

[Al-Mujaahid] said he did not notice the sign at Aldi prohibiting weapons in the store, and that if he had, he would have gone elsewhere. He said since he began to carry a concealed gun, he has stopped from going into other businesses where he did see the sign.

Okay, now what is the effect of those signs? Are they meaningless when we're happy about the use of the gun?

From the comments at the link:

This person illegally carried a weapon into a public store which prohibits firearms. Now he want to be a hero? What a pathetic loser, fine example of why CC is a failed policy. The ends do not justify the means. Nazir should be happy he did not get killed himself.

NOTE: As a matter of the law on the books, it's defined as a crime to violate those "no weapons" signs, even if you have a concealed-carry permit.